If I were you, I tell them that every one you know who had the reverse fix done, required an ECU update. This is essential because a new electronic part was fitted and the ECU needs to know about it, so that it does not throw an error code. Either the dealer does not have a clue or they are being plain stupid trying to do a posh posh bang bang job and move to the next warranty job. Most of us had the ECU update done overnight and my personal theory is that a dealership would have one or two laptops available. They use them during the day for minor repairs etc on other bikes and since the update related to the ECU will take a bit longer, they do it overnight so that they can work or other bikes during the day.